Slider for slide fasteners



Jan. z, 1940.

A. E, CARLILE SLIDER Foa SLIDE FAsTENERs Filed Sept. 24, 1938 A TTORNEYS.

Patented Jan. 2, 1940 UNITED STATES SLIDER. FOR SLIDE FASTENERS Alfred E. Carlile, Meadville, Pa., assigner to Talon, Inc., a corporation of Pennsylvania Application september 24, 1493s, serial No. 231,588

4 Claims.

My invention relates to sliders for slide fasteners and more particularly to an improved automatic locking slider.

Spring automatic locking sliders are now on the market but in some applications of the fastener they are objected to on the ground that there is a lug and locking mechanism projecting above the surface of the slider making the whole structure relatively thick.

The object of my invention is to produce an improved automatic lock slider Without materially increasing the thickness of the slider. According to my invention a bail is pivoted in the sides of the slider and suitable automatic locking means 16 is incorporated in the bail.

In the accompanying drawing I have shown for purposes of illustration one embodiment which my invention may assume in practice. In the drawing:

Fig. 1 is a plan view of a fastener equipped with my automatic lock slider; Y

Fig. 2 is a horizontal cross-section through the slider;

Fig. 3 is a vertical cross-section on line 3-3 Fig. 4 is an end view of the slider.

The fastener may be of any conventional type, the one illustrated having tapes 5, 6 with fastener elements 1, 8 on'their respective edges.

a0 The slider 9 may also be of any conventional external shape,the one illustrated being generally octagonal. As usual the slider has a Y- shaped channel I0 through which the fastener elements 1, 8 are guided in openingor closing u the fastener.

Normally without any lockingmeans the slider will tend to move downwardly to open position whenever a side pull is placed on the fastener in the locality of the slider, but in this n case it is prevented from doing so by my improved locking means. A bail, herein made of two pieces Il, I2 hinged together at I3, has trunnions I4 and I5 engaging in bearings I 6, I1 respectively, in the sides of the slider. At least 5 one of the bearings I1 extends entirely through the side wall of the slider and into the slider channel I0. It also is tapered outwardly from the channel toward the side of the slider. trunnion I1 is tapered to correspond to the ta- 50 per of the bearing I5 and is of suilicient length to extend into the slider channel and engage between a pair `o1! fastener elements as seen in Fig. 3. The sides of 'the bail and likewise the trunnions are normally pressed toward each other 5| by a spring IB which has a connection on oppo- Thel site sides of the hinge I3 with the two parts of the bail at I9 and 20. The tendency of the spring therefore is to urge the locking pivot I'I into the slider channel and engage between the fastener elements thus preventing unintentional 6 movement of the slider. Suitable pulling means herein shown as a pull chain 2| is attached to the bail preferably at opposite sides at I9 and 20. In operation the slider will be normally locked whenever the pull is released at any point. When l0 it is desired to move the slider a pull is applied to the chain 2|. Because of the spaced apart attaching points of the pull chain on the opposite sides of the bail, it will tend to spring the bail apart. The tapered construction of the l locking pivot and its bearing also assist in spreading the sides of the bail apart when a pull is. applied. The locking trunnion will thus be withdrawn from the slider channel and the slider will be free to move along the fastener elements. 20 If desired, of course, the pivots on both sides of the bail may be made the same so as to provide a double locking effect. Preferably, however, the locking pivot is on only one side because the fastener elements are staggered on the opposite sides of the Stringer and unless the end of the locking projections were likewise staggered there would not be any apreciable locking effect except on one side. 'I'he bail can spread only a limited -amount due to the stop 22 at the hinge 80 connection.

While I have shown and describedin this applicatonone embodiment which my invention may assume in practice, it will be understoodthat this embodiment is for the purpose of illus- $5 tration and that various other forms may be devised within the scope of my invention as set forth in the appended claims.

What I claim as my invention is: f

1. In a slider for slide fasteners of the class 40 described having a channel through which the fastener elements pass, a bail having trunnions at each end normally resiliently urged together, and bearings extending inwardly from opposite sides of said slider for pivotally supporting said trunnions, at least one of said bearings communicating with the channel in said slider and providing for projection of the supported trunnion into said channel for engaging the fastener elements passing through said channel.

2. A slider for slide fasteners of the class described having a channel through which the fastener elements pass, a bail pivoted in'the sides of said slider, saidv bail comprising twol parts hinged together, means connected te the bail for resiliently urging the sides of the ball toward one another, and a locking projection on one side of the bail sumciently long to enter the slider channel when the sides of the bail are resiliently pressed towardeach other, and pulling means having a connection with each of the two parts of the bail to move the sides of the bail apart when a pull is applied to the pulling means to move said projection' out of the slider channel.

3. A slider for slide fasteners of the class described having a channel through which the fastener elements pass, thelsides of the slider having bearings through the sides of the slider and at least oneof which extends through the channel wall, the said bearing extending through the channel wall being tapered outwardly toward the side of the slider, and a spring bail having trunnions engaging in said bearings, one of said trunnions being tapered and of sumcient length when the sides of the bail are sprung toward one another to extend into the slider channel, pulling means attached to the bail for operating the slider to spread the sides of the bail against the spring action sumciently to cause the locking trunnion to withdraw from the slider channel.

4. A slider for slide fasteners of the class described having a channel through which the fastener elements pass, said slider having trunnionreceiving' bearing recesses extending transversely inwardly from the sides of said slider, one of said bearing recesses extending inwardly into the slider channel, a bail having trunnions disposed in said trunnion-receiving bearing recesses,

and' yielding means associated with said bail and normally yieldingly urging one of said trunnions inwardly in the bearing recess extending into the slider channel, toward locking engagement with fastener elements in the slider channel.

ALFRED E. CARLILE. 

